140 lines
3.7 KiB
Go
140 lines
3.7 KiB
Go
/*
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Copyright 2020 The Qmgo Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package field
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import (
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"context"
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"reflect"
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"time"
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"github.com/qiniu/qmgo/operator"
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)
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var nilTime time.Time
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// filedHandler defines the relations between field type and handler
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var fieldHandler = map[operator.OpType]func(doc interface{}) error{
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operator.BeforeInsert: beforeInsert,
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operator.BeforeUpdate: beforeUpdate,
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operator.BeforeReplace: beforeUpdate,
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operator.BeforeUpsert: beforeUpsert,
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}
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//func init() {
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// middleware.Register(Do)
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//}
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// Do call the specific method to handle field based on fType
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// Don't use opts here
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func Do(ctx context.Context, doc interface{}, opType operator.OpType, opts ...interface{}) error {
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to := reflect.TypeOf(doc)
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if to == nil {
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return nil
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}
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switch reflect.TypeOf(doc).Kind() {
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case reflect.Slice:
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return sliceHandle(doc, opType)
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case reflect.Ptr:
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v := reflect.ValueOf(doc).Elem()
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switch v.Kind() {
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case reflect.Slice:
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return sliceHandle(v.Interface(), opType)
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default:
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return do(doc, opType)
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}
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}
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//fmt.Println("not support type")
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return nil
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}
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// sliceHandle handles the slice docs
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func sliceHandle(docs interface{}, opType operator.OpType) error {
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// []interface{}{UserType{}...}
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if h, ok := docs.([]interface{}); ok {
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for _, v := range h {
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if err := do(v, opType); err != nil {
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return err
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}
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}
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return nil
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}
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// []UserType{}
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s := reflect.ValueOf(docs)
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for i := 0; i < s.Len(); i++ {
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if err := do(s.Index(i).Interface(), opType); err != nil {
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return err
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}
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}
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return nil
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}
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// beforeInsert handles field before insert
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// If value of field createAt is valid in doc, upsert doesn't change it
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// If value of field id is valid in doc, upsert doesn't change it
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// Change the value of field updateAt anyway
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func beforeInsert(doc interface{}) error {
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if ih, ok := doc.(DefaultFieldHook); ok {
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ih.DefaultId()
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ih.DefaultCreateAt()
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ih.DefaultUpdateAt()
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}
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if ih, ok := doc.(CustomFieldsHook); ok {
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fields := ih.CustomFields()
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fields.(*CustomFields).CustomId(doc)
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fields.(*CustomFields).CustomCreateTime(doc)
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fields.(*CustomFields).CustomUpdateTime(doc)
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}
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return nil
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}
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// beforeUpdate handles field before update
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func beforeUpdate(doc interface{}) error {
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if ih, ok := doc.(DefaultFieldHook); ok {
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ih.DefaultUpdateAt()
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}
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if ih, ok := doc.(CustomFieldsHook); ok {
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fields := ih.CustomFields()
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fields.(*CustomFields).CustomUpdateTime(doc)
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}
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return nil
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}
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// beforeUpsert handles field before upsert
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// If value of field createAt is valid in doc, upsert doesn't change it
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// If value of field id is valid in doc, upsert doesn't change it
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// Change the value of field updateAt anyway
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func beforeUpsert(doc interface{}) error {
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if ih, ok := doc.(DefaultFieldHook); ok {
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ih.DefaultId()
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ih.DefaultCreateAt()
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ih.DefaultUpdateAt()
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}
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if ih, ok := doc.(CustomFieldsHook); ok {
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fields := ih.CustomFields()
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fields.(*CustomFields).CustomId(doc)
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fields.(*CustomFields).CustomCreateTime(doc)
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fields.(*CustomFields).CustomUpdateTime(doc)
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}
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return nil
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}
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// do check if opType is supported and call fieldHandler
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func do(doc interface{}, opType operator.OpType) error {
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if f, ok := fieldHandler[opType]; !ok {
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return nil
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} else {
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return f(doc)
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}
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}
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